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<FONT color="green">001</FONT>    /**<a name="line.1"></a>
<FONT color="green">002</FONT>    Copyright (c) 2011, Joshua Storck<a name="line.2"></a>
<FONT color="green">003</FONT>    All rights reserved.<a name="line.3"></a>
<FONT color="green">004</FONT>    <a name="line.4"></a>
<FONT color="green">005</FONT>    Redistribution and use in source and binary forms, with or without<a name="line.5"></a>
<FONT color="green">006</FONT>    modification, are permitted provided that the following conditions are met:<a name="line.6"></a>
<FONT color="green">007</FONT>     * Redistributions of source code must retain the above copyright<a name="line.7"></a>
<FONT color="green">008</FONT>          notice, this list of conditions and the following disclaimer.<a name="line.8"></a>
<FONT color="green">009</FONT>     * Redistributions in binary form must reproduce the above copyright<a name="line.9"></a>
<FONT color="green">010</FONT>          notice, this list of conditions and the following disclaimer in the<a name="line.10"></a>
<FONT color="green">011</FONT>          documentation and/or other materials provided with the distribution.<a name="line.11"></a>
<FONT color="green">012</FONT>     * The name of Joshua Storck may not be used to endorse or promote products<a name="line.12"></a>
<FONT color="green">013</FONT>          derived from this software without specific prior written permission.<a name="line.13"></a>
<FONT color="green">014</FONT>    <a name="line.14"></a>
<FONT color="green">015</FONT>    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND<a name="line.15"></a>
<FONT color="green">016</FONT>    ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED<a name="line.16"></a>
<FONT color="green">017</FONT>    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE<a name="line.17"></a>
<FONT color="green">018</FONT>    DISCLAIMED. IN NO EVENT SHALL JOSHUA STORCK BE LIABLE FOR ANY<a name="line.18"></a>
<FONT color="green">019</FONT>    DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES<a name="line.19"></a>
<FONT color="green">020</FONT>    (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;<a name="line.20"></a>
<FONT color="green">021</FONT>    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND<a name="line.21"></a>
<FONT color="green">022</FONT>    ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT<a name="line.22"></a>
<FONT color="green">023</FONT>    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS<a name="line.23"></a>
<FONT color="green">024</FONT>    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.<a name="line.24"></a>
<FONT color="green">025</FONT>    <a name="line.25"></a>
<FONT color="green">026</FONT>     */<a name="line.26"></a>
<FONT color="green">027</FONT>    <a name="line.27"></a>
<FONT color="green">028</FONT>    package com.unclestorck.spicfg;<a name="line.28"></a>
<FONT color="green">029</FONT>    <a name="line.29"></a>
<FONT color="green">030</FONT>    import java.io.File;<a name="line.30"></a>
<FONT color="green">031</FONT>    import java.io.FileNotFoundException;<a name="line.31"></a>
<FONT color="green">032</FONT>    import java.io.FileOutputStream;<a name="line.32"></a>
<FONT color="green">033</FONT>    import java.io.PrintStream;<a name="line.33"></a>
<FONT color="green">034</FONT>    import java.util.ArrayList;<a name="line.34"></a>
<FONT color="green">035</FONT>    import java.util.Collections;<a name="line.35"></a>
<FONT color="green">036</FONT>    import java.util.HashMap;<a name="line.36"></a>
<FONT color="green">037</FONT>    import java.util.List;<a name="line.37"></a>
<FONT color="green">038</FONT>    import java.util.Map;<a name="line.38"></a>
<FONT color="green">039</FONT>    import java.util.ServiceLoader;<a name="line.39"></a>
<FONT color="green">040</FONT>    import java.util.Set;<a name="line.40"></a>
<FONT color="green">041</FONT>    import java.util.Map.Entry;<a name="line.41"></a>
<FONT color="green">042</FONT>    <a name="line.42"></a>
<FONT color="green">043</FONT>    import javax.annotation.processing.AbstractProcessor;<a name="line.43"></a>
<FONT color="green">044</FONT>    import javax.annotation.processing.Processor;<a name="line.44"></a>
<FONT color="green">045</FONT>    import javax.annotation.processing.RoundEnvironment;<a name="line.45"></a>
<FONT color="green">046</FONT>    import javax.annotation.processing.SupportedOptions;<a name="line.46"></a>
<FONT color="green">047</FONT>    import javax.annotation.processing.SupportedSourceVersion;<a name="line.47"></a>
<FONT color="green">048</FONT>    import javax.lang.model.SourceVersion;<a name="line.48"></a>
<FONT color="green">049</FONT>    import javax.lang.model.element.Element;<a name="line.49"></a>
<FONT color="green">050</FONT>    import javax.lang.model.element.TypeElement;<a name="line.50"></a>
<FONT color="green">051</FONT>    import javax.lang.model.type.DeclaredType;<a name="line.51"></a>
<FONT color="green">052</FONT>    import javax.lang.model.type.MirroredTypeException;<a name="line.52"></a>
<FONT color="green">053</FONT>    import javax.tools.Diagnostic.Kind;<a name="line.53"></a>
<FONT color="green">054</FONT>    <a name="line.54"></a>
<FONT color="green">055</FONT>    /**<a name="line.55"></a>
<FONT color="green">056</FONT>     * An annotation {@link Processor} that generates a service provider<a name="line.56"></a>
<FONT color="green">057</FONT>     * configuration file in META-INF/services/qualifiedServiceName that can be used<a name="line.57"></a>
<FONT color="green">058</FONT>     * with {@link ServiceLoader}. This processor will find all classes that are<a name="line.58"></a>
<FONT color="green">059</FONT>     * annotated with {@link ServiceProvider} and then group those classes by the<a name="line.59"></a>
<FONT color="green">060</FONT>     * {@link ServiceProvider#value()}. For each {@link ServiceProvider#value()},<a name="line.60"></a>
<FONT color="green">061</FONT>     * this processor will generate a file named<a name="line.61"></a>
<FONT color="green">062</FONT>     * META-INF/services/qualifiedServiceName where qualifiedServiceName is the<a name="line.62"></a>
<FONT color="green">063</FONT>     * qualified name of the type specified in {@link ServiceProvider#value()}. The<a name="line.63"></a>
<FONT color="green">064</FONT>     * file will contain all of the classes that are annotated with<a name="line.64"></a>
<FONT color="green">065</FONT>     * {@link ServiceProvider} for that type. This processor requires an option of<a name="line.65"></a>
<FONT color="green">066</FONT>     * 'outputDir' which specifies the output location under which the META-INF is<a name="line.66"></a>
<FONT color="green">067</FONT>     * created. This processor will create the META-INF/services directories if they<a name="line.67"></a>
<FONT color="green">068</FONT>     * don't already exist.<a name="line.68"></a>
<FONT color="green">069</FONT>     * <a name="line.69"></a>
<FONT color="green">070</FONT>     * &lt;p&gt;<a name="line.70"></a>
<FONT color="green">071</FONT>     * Here is an example of a class that implements the {@link Processor} service<a name="line.71"></a>
<FONT color="green">072</FONT>     * provider interface:<a name="line.72"></a>
<FONT color="green">073</FONT>     * <a name="line.73"></a>
<FONT color="green">074</FONT>     * &lt;pre&gt;<a name="line.74"></a>
<FONT color="green">075</FONT>     * &amp;#064;ServiceProvider(Processor.class)<a name="line.75"></a>
<FONT color="green">076</FONT>     * public class CodeGenerator extends AbstractProcessor {<a name="line.76"></a>
<FONT color="green">077</FONT>     *     // Processor methods go here    <a name="line.77"></a>
<FONT color="green">078</FONT>     * }<a name="line.78"></a>
<FONT color="green">079</FONT>     * &lt;/pre&gt;<a name="line.79"></a>
<FONT color="green">080</FONT>     * <a name="line.80"></a>
<FONT color="green">081</FONT>     * For the example above, this processor will generate a file named<a name="line.81"></a>
<FONT color="green">082</FONT>     * META-INF/services/javax.annotation.processing.Processor which will contain<a name="line.82"></a>
<FONT color="green">083</FONT>     * one line with the fully qualified name of the CodeGenerator class.<a name="line.83"></a>
<FONT color="green">084</FONT>     * <a name="line.84"></a>
<FONT color="green">085</FONT>     * &lt;p&gt;<a name="line.85"></a>
<FONT color="green">086</FONT>     * Unfortunately, the {@link ServiceProviderProcessor} cannot use the<a name="line.86"></a>
<FONT color="green">087</FONT>     * {@link ServiceProvider} annotation as it would have to run on itself before<a name="line.87"></a>
<FONT color="green">088</FONT>     * it was even compiled (aka chicken and egg problem).<a name="line.88"></a>
<FONT color="green">089</FONT>     */<a name="line.89"></a>
<FONT color="green">090</FONT>    @SupportedOptions( { "outputDir" })<a name="line.90"></a>
<FONT color="green">091</FONT>    @SupportedSourceVersion(SourceVersion.RELEASE_6)<a name="line.91"></a>
<FONT color="green">092</FONT>    public class ServiceProviderProcessor extends AbstractProcessor {<a name="line.92"></a>
<FONT color="green">093</FONT>    <a name="line.93"></a>
<FONT color="green">094</FONT>        /**<a name="line.94"></a>
<FONT color="green">095</FONT>         * Used for obtaining the {@link TypeElement} from the {@link Element} that<a name="line.95"></a>
<FONT color="green">096</FONT>         * is returned from the call to<a name="line.96"></a>
<FONT color="green">097</FONT>         * {@link RoundEnvironment#getElementsAnnotatedWith(TypeElement)}.<a name="line.97"></a>
<FONT color="green">098</FONT>         */<a name="line.98"></a>
<FONT color="green">099</FONT>        private static final TypeElementVisitor TYPE_ELEMENT_VISITOR = new TypeElementVisitor();<a name="line.99"></a>
<FONT color="green">100</FONT>    <a name="line.100"></a>
<FONT color="green">101</FONT>        /**<a name="line.101"></a>
<FONT color="green">102</FONT>         * Used for obtaining the {@link DeclaredType} from the class that is<a name="line.102"></a>
<FONT color="green">103</FONT>         * specified in {@link ServiceProvider#value()}.<a name="line.103"></a>
<FONT color="green">104</FONT>         */<a name="line.104"></a>
<FONT color="green">105</FONT>        private static final DeclaredTypeVisitor DECLARED_TYPE_VISITOR = new DeclaredTypeVisitor();<a name="line.105"></a>
<FONT color="green">106</FONT>    <a name="line.106"></a>
<FONT color="green">107</FONT>        /*<a name="line.107"></a>
<FONT color="green">108</FONT>         * (non-Javadoc)<a name="line.108"></a>
<FONT color="green">109</FONT>         * <a name="line.109"></a>
<FONT color="green">110</FONT>         * @see javax.annotation.processing.AbstractProcessor#process(java.util.Set,<a name="line.110"></a>
<FONT color="green">111</FONT>         * javax.annotation.processing.RoundEnvironment)<a name="line.111"></a>
<FONT color="green">112</FONT>         */<a name="line.112"></a>
<FONT color="green">113</FONT>        @Override<a name="line.113"></a>
<FONT color="green">114</FONT>        public boolean process(Set&lt;? extends TypeElement&gt; annotations,<a name="line.114"></a>
<FONT color="green">115</FONT>                RoundEnvironment roundEnv) {<a name="line.115"></a>
<FONT color="green">116</FONT>            Map&lt;String, List&lt;TypeElement&gt;&gt; services = new HashMap&lt;String, List&lt;TypeElement&gt;&gt;();<a name="line.116"></a>
<FONT color="green">117</FONT>            boolean success = true;<a name="line.117"></a>
<FONT color="green">118</FONT>            for (TypeElement annotation : annotations) {<a name="line.118"></a>
<FONT color="green">119</FONT>                if (!ServiceProvider.class.getName().equals(<a name="line.119"></a>
<FONT color="green">120</FONT>                        annotation.getQualifiedName().toString()))<a name="line.120"></a>
<FONT color="green">121</FONT>                    continue;<a name="line.121"></a>
<FONT color="green">122</FONT>                success &amp;= getServices(services, roundEnv<a name="line.122"></a>
<FONT color="green">123</FONT>                        .getElementsAnnotatedWith(annotation));<a name="line.123"></a>
<FONT color="green">124</FONT>            }<a name="line.124"></a>
<FONT color="green">125</FONT>            if (!success || services.isEmpty())<a name="line.125"></a>
<FONT color="green">126</FONT>                return success;<a name="line.126"></a>
<FONT color="green">127</FONT>            File servicesDirectory = createServicesDirectory();<a name="line.127"></a>
<FONT color="green">128</FONT>            if (servicesDirectory == null)<a name="line.128"></a>
<FONT color="green">129</FONT>                return false;<a name="line.129"></a>
<FONT color="green">130</FONT>            for (Entry&lt;String, List&lt;TypeElement&gt;&gt; entry : services.entrySet()) {<a name="line.130"></a>
<FONT color="green">131</FONT>                success &amp;= createServiceFile(servicesDirectory, entry);<a name="line.131"></a>
<FONT color="green">132</FONT>            }<a name="line.132"></a>
<FONT color="green">133</FONT>            return success;<a name="line.133"></a>
<FONT color="green">134</FONT>        }<a name="line.134"></a>
<FONT color="green">135</FONT>    <a name="line.135"></a>
<FONT color="green">136</FONT>        /*<a name="line.136"></a>
<FONT color="green">137</FONT>         * (non-Javadoc)<a name="line.137"></a>
<FONT color="green">138</FONT>         * <a name="line.138"></a>
<FONT color="green">139</FONT>         * @see<a name="line.139"></a>
<FONT color="green">140</FONT>         * javax.annotation.processing.AbstractProcessor#getSupportedAnnotationTypes<a name="line.140"></a>
<FONT color="green">141</FONT>         * ()<a name="line.141"></a>
<FONT color="green">142</FONT>         */<a name="line.142"></a>
<FONT color="green">143</FONT>        @Override<a name="line.143"></a>
<FONT color="green">144</FONT>        public Set&lt;String&gt; getSupportedAnnotationTypes() {<a name="line.144"></a>
<FONT color="green">145</FONT>            return Collections.singleton(ServiceProvider.class.getName());<a name="line.145"></a>
<FONT color="green">146</FONT>        }<a name="line.146"></a>
<FONT color="green">147</FONT>    <a name="line.147"></a>
<FONT color="green">148</FONT>        /**<a name="line.148"></a>
<FONT color="green">149</FONT>         * Creates the META-INF/services directory underneath the directory<a name="line.149"></a>
<FONT color="green">150</FONT>         * specified by the outputDir option.<a name="line.150"></a>
<FONT color="green">151</FONT>         * <a name="line.151"></a>
<FONT color="green">152</FONT>         * @return the META-INF/services directory or null if there was an error<a name="line.152"></a>
<FONT color="green">153</FONT>         */<a name="line.153"></a>
<FONT color="green">154</FONT>        private final File createServicesDirectory() {<a name="line.154"></a>
<FONT color="green">155</FONT>            String outputDirectoryName = processingEnv.getOptions()<a name="line.155"></a>
<FONT color="green">156</FONT>                    .get("outputDir");<a name="line.156"></a>
<FONT color="green">157</FONT>            processingEnv.getMessager().printMessage(Kind.NOTE,<a name="line.157"></a>
<FONT color="green">158</FONT>                    "Options: " + processingEnv.getOptions());<a name="line.158"></a>
<FONT color="green">159</FONT>            if (outputDirectoryName == null) {<a name="line.159"></a>
<FONT color="green">160</FONT>                processingEnv.getMessager()<a name="line.160"></a>
<FONT color="green">161</FONT>                        .printMessage(<a name="line.161"></a>
<FONT color="green">162</FONT>                                Kind.ERROR,<a name="line.162"></a>
<FONT color="green">163</FONT>                                "The outputDir option was not specified for the "<a name="line.163"></a>
<FONT color="green">164</FONT>                                + ServiceProvider.class.getName()<a name="line.164"></a>
<FONT color="green">165</FONT>                                        + " annotation processor");<a name="line.165"></a>
<FONT color="green">166</FONT>                return null;<a name="line.166"></a>
<FONT color="green">167</FONT>            }<a name="line.167"></a>
<FONT color="green">168</FONT>            File outputDirectory = new File(outputDirectoryName);<a name="line.168"></a>
<FONT color="green">169</FONT>            if (!outputDirectory.exists()) {<a name="line.169"></a>
<FONT color="green">170</FONT>                processingEnv.getMessager().printMessage(<a name="line.170"></a>
<FONT color="green">171</FONT>                        Kind.ERROR,<a name="line.171"></a>
<FONT color="green">172</FONT>                        "The output directory '" + outputDirectoryName<a name="line.172"></a>
<FONT color="green">173</FONT>                                + "' for the "<a name="line.173"></a>
<FONT color="green">174</FONT>     + ServiceProvider.class.getName()<a name="line.174"></a>
<FONT color="green">175</FONT>                                + " annotation processor does not exist");<a name="line.175"></a>
<FONT color="green">176</FONT>                return null;<a name="line.176"></a>
<FONT color="green">177</FONT>            }<a name="line.177"></a>
<FONT color="green">178</FONT>            File servicesDirectory = new File(outputDirectory, "META-INF");<a name="line.178"></a>
<FONT color="green">179</FONT>            servicesDirectory = new File(servicesDirectory, "services");<a name="line.179"></a>
<FONT color="green">180</FONT>            if (servicesDirectory.exists())<a name="line.180"></a>
<FONT color="green">181</FONT>                return servicesDirectory;<a name="line.181"></a>
<FONT color="green">182</FONT>            else if (!servicesDirectory.mkdirs()) {<a name="line.182"></a>
<FONT color="green">183</FONT>                processingEnv.getMessager().printMessage(<a name="line.183"></a>
<FONT color="green">184</FONT>                        Kind.ERROR,<a name="line.184"></a>
<FONT color="green">185</FONT>                        "Unable to create services directory '" + servicesDirectory<a name="line.185"></a>
<FONT color="green">186</FONT>                                + "'");<a name="line.186"></a>
<FONT color="green">187</FONT>                return null;<a name="line.187"></a>
<FONT color="green">188</FONT>            }<a name="line.188"></a>
<FONT color="green">189</FONT>            return servicesDirectory;<a name="line.189"></a>
<FONT color="green">190</FONT>        }<a name="line.190"></a>
<FONT color="green">191</FONT>    <a name="line.191"></a>
<FONT color="green">192</FONT>        /**<a name="line.192"></a>
<FONT color="green">193</FONT>         * Populates the specified map with a mapping from a<a name="line.193"></a>
<FONT color="green">194</FONT>         * {@link ServiceProvider#value()} to a list of {@link TypeElement}s. This<a name="line.194"></a>
<FONT color="green">195</FONT>         * method is mostly for capturing errors due to 'downcasting' from an<a name="line.195"></a>
<FONT color="green">196</FONT>         * {@link Element} to a {@link TypeElement} and converting the<a name="line.196"></a>
<FONT color="green">197</FONT>         * {@link MirroredTypeException} to an actual {@link TypeElement} because<a name="line.197"></a>
<FONT color="green">198</FONT>         * the {@link ServiceProvider#value()} contains a references to a class.<a name="line.198"></a>
<FONT color="green">199</FONT>         * <a name="line.199"></a>
<FONT color="green">200</FONT>         * @param services<a name="line.200"></a>
<FONT color="green">201</FONT>         *            the populated map<a name="line.201"></a>
<FONT color="green">202</FONT>         * @param elements<a name="line.202"></a>
<FONT color="green">203</FONT>         *            the elements that are annotated with {@link ServiceProvider}.<a name="line.203"></a>
<FONT color="green">204</FONT>         * @return true if it succeeds, false otherwise<a name="line.204"></a>
<FONT color="green">205</FONT>         */<a name="line.205"></a>
<FONT color="green">206</FONT>        private boolean getServices(Map&lt;String, List&lt;TypeElement&gt;&gt; services,<a name="line.206"></a>
<FONT color="green">207</FONT>                Set&lt;? extends Element&gt; elements) {<a name="line.207"></a>
<FONT color="green">208</FONT>            boolean success = true;<a name="line.208"></a>
<FONT color="green">209</FONT>            for (Element element : elements) {<a name="line.209"></a>
<FONT color="green">210</FONT>                TypeElement typeElement = element<a name="line.210"></a>
<FONT color="green">211</FONT>                        .accept(TYPE_ELEMENT_VISITOR, null);<a name="line.211"></a>
<FONT color="green">212</FONT>                TypeElement serviceType;<a name="line.212"></a>
<FONT color="green">213</FONT>                if (typeElement == null) {<a name="line.213"></a>
<FONT color="green">214</FONT>                    processingEnv<a name="line.214"></a>
<FONT color="green">215</FONT>                            .getMessager()<a name="line.215"></a>
<FONT color="green">216</FONT>                            .printMessage(<a name="line.216"></a>
<FONT color="green">217</FONT>                                    Kind.ERROR,<a name="line.217"></a>
<FONT color="green">218</FONT>                                    "Encountered a "<a name="line.218"></a>
<FONT color="green">219</FONT>                                            + ServiceProvider.class.getName()<a name="line.219"></a>
<FONT color="green">220</FONT>                                            + " annotation on a "<a name="line.220"></a>
<FONT color="green">221</FONT>                                            + element.getKind()<a name="line.221"></a>
<FONT color="green">222</FONT>                                            + " element when it should have been on a type element",<a name="line.222"></a>
<FONT color="green">223</FONT>                                    element);<a name="line.223"></a>
<FONT color="green">224</FONT>                    success = false;<a name="line.224"></a>
<FONT color="green">225</FONT>                } else if ((serviceType = getServiceType(typeElement)) != null) {<a name="line.225"></a>
<FONT color="green">226</FONT>                    List&lt;TypeElement&gt; types = services.get(serviceType<a name="line.226"></a>
<FONT color="green">227</FONT>                            .getQualifiedName().toString());<a name="line.227"></a>
<FONT color="green">228</FONT>                    if (types == null) {<a name="line.228"></a>
<FONT color="green">229</FONT>                        types = new ArrayList&lt;TypeElement&gt;();<a name="line.229"></a>
<FONT color="green">230</FONT>                        services.put(serviceType.getQualifiedName().toString(),<a name="line.230"></a>
<FONT color="green">231</FONT>                                types);<a name="line.231"></a>
<FONT color="green">232</FONT>                    }<a name="line.232"></a>
<FONT color="green">233</FONT>                    types.add(typeElement);<a name="line.233"></a>
<FONT color="green">234</FONT>                }<a name="line.234"></a>
<FONT color="green">235</FONT>            }<a name="line.235"></a>
<FONT color="green">236</FONT>            return success;<a name="line.236"></a>
<FONT color="green">237</FONT>        }<a name="line.237"></a>
<FONT color="green">238</FONT>    <a name="line.238"></a>
<FONT color="green">239</FONT>        /**<a name="line.239"></a>
<FONT color="green">240</FONT>         * Returns the {@link TypeElement} for the {@link ServiceProvider#value()}<a name="line.240"></a>
<FONT color="green">241</FONT>         * for the {@link ServiceProvider} annotation on the specified<a name="line.241"></a>
<FONT color="green">242</FONT>         * {@link TypeElement}. When obtaining an annotation field that is of type<a name="line.242"></a>
<FONT color="green">243</FONT>         * {@link Class} in an annotation {@link Processor} a<a name="line.243"></a>
<FONT color="green">244</FONT>         * {@link MirroredTypeException} is always thrown. This method converts that<a name="line.244"></a>
<FONT color="green">245</FONT>         * {@link MirroredTypeException} to a {@link DeclaredType} and converts that<a name="line.245"></a>
<FONT color="green">246</FONT>         * {@link DeclaredType} to a {@link TypeElement}.<a name="line.246"></a>
<FONT color="green">247</FONT>         * <a name="line.247"></a>
<FONT color="green">248</FONT>         * @param typeElement<a name="line.248"></a>
<FONT color="green">249</FONT>         *            the annotated class<a name="line.249"></a>
<FONT color="green">250</FONT>         * @return the {@link ServiceProvider#value()} or null if there is an error<a name="line.250"></a>
<FONT color="green">251</FONT>         */<a name="line.251"></a>
<FONT color="green">252</FONT>        private final TypeElement getServiceType(TypeElement typeElement) {<a name="line.252"></a>
<FONT color="green">253</FONT>            DeclaredType declaredType = null;<a name="line.253"></a>
<FONT color="green">254</FONT>            try {<a name="line.254"></a>
<FONT color="green">255</FONT>                typeElement.getAnnotation(ServiceProvider.class).value();<a name="line.255"></a>
<FONT color="green">256</FONT>            } catch (MirroredTypeException error) {<a name="line.256"></a>
<FONT color="green">257</FONT>                declaredType = error.getTypeMirror().accept(DECLARED_TYPE_VISITOR,<a name="line.257"></a>
<FONT color="green">258</FONT>                        null);<a name="line.258"></a>
<FONT color="green">259</FONT>            }<a name="line.259"></a>
<FONT color="green">260</FONT>            if (declaredType == null) {<a name="line.260"></a>
<FONT color="green">261</FONT>                processingEnv.getMessager().printMessage(Kind.ERROR, "Service class for the " +<a name="line.261"></a>
<FONT color="green">262</FONT>     ServiceProvider.class.getName()<a name="line.262"></a>
<FONT color="green">263</FONT>                                + " annotation on "<a name="line.263"></a>
<FONT color="green">264</FONT>                                +<a name="line.264"></a>
<FONT color="green">265</FONT>                        typeElement.getQualifiedName() + " is not a declared type");<a name="line.265"></a>
<FONT color="green">266</FONT>                return null;<a name="line.266"></a>
<FONT color="green">267</FONT>            }<a name="line.267"></a>
<FONT color="green">268</FONT>            TypeElement serviceType = declaredType.asElement().accept(<a name="line.268"></a>
<FONT color="green">269</FONT>                    TYPE_ELEMENT_VISITOR, null);<a name="line.269"></a>
<FONT color="green">270</FONT>            if (serviceType == null) {<a name="line.270"></a>
<FONT color="green">271</FONT>                processingEnv.getMessager().printMessage(<a name="line.271"></a>
<FONT color="green">272</FONT>                        Kind.ERROR,<a name="line.272"></a>
<FONT color="green">273</FONT>                        "Service class for the " + ServiceProvider.class.getName()<a name="line.273"></a>
<FONT color="green">274</FONT>                                + " annotation on "<a name="line.274"></a>
<FONT color="green">275</FONT>                                + typeElement.getQualifiedName()<a name="line.275"></a>
<FONT color="green">276</FONT>                                + " is not a type element");<a name="line.276"></a>
<FONT color="green">277</FONT>                return null;<a name="line.277"></a>
<FONT color="green">278</FONT>            }<a name="line.278"></a>
<FONT color="green">279</FONT>            return serviceType;<a name="line.279"></a>
<FONT color="green">280</FONT>        }<a name="line.280"></a>
<FONT color="green">281</FONT>    <a name="line.281"></a>
<FONT color="green">282</FONT>        /**<a name="line.282"></a>
<FONT color="green">283</FONT>         * Writes out all of the qualified class names of services to a services<a name="line.283"></a>
<FONT color="green">284</FONT>         * file.<a name="line.284"></a>
<FONT color="green">285</FONT>         * <a name="line.285"></a>
<FONT color="green">286</FONT>         * @param servicesDirectory<a name="line.286"></a>
<FONT color="green">287</FONT>         *            the top level services directory - outputDir/META-INF/services<a name="line.287"></a>
<FONT color="green">288</FONT>         * @param entry<a name="line.288"></a>
<FONT color="green">289</FONT>         *            the key is the name of the output file and the value is the<a name="line.289"></a>
<FONT color="green">290</FONT>         *            list of classes that implement/extend the service.<a name="line.290"></a>
<FONT color="green">291</FONT>         * @return true if successful, false otherwise<a name="line.291"></a>
<FONT color="green">292</FONT>         */<a name="line.292"></a>
<FONT color="green">293</FONT>        private final boolean createServiceFile(File servicesDirectory,<a name="line.293"></a>
<FONT color="green">294</FONT>                Entry&lt;String, List&lt;TypeElement&gt;&gt; entry) {<a name="line.294"></a>
<FONT color="green">295</FONT>            File outputFile = new File(servicesDirectory, entry.getKey());<a name="line.295"></a>
<FONT color="green">296</FONT>            PrintStream printer;<a name="line.296"></a>
<FONT color="green">297</FONT>            try {<a name="line.297"></a>
<FONT color="green">298</FONT>                printer = new PrintStream(new FileOutputStream(outputFile));<a name="line.298"></a>
<FONT color="green">299</FONT>            } catch (FileNotFoundException error) {<a name="line.299"></a>
<FONT color="green">300</FONT>                processingEnv.getMessager().printMessage(<a name="line.300"></a>
<FONT color="green">301</FONT>                        Kind.ERROR,<a name="line.301"></a>
<FONT color="green">302</FONT>                        "Unable to create services file '" + outputFile + "': "<a name="line.302"></a>
<FONT color="green">303</FONT>                                + error.getMessage());<a name="line.303"></a>
<FONT color="green">304</FONT>                return false;<a name="line.304"></a>
<FONT color="green">305</FONT>            }<a name="line.305"></a>
<FONT color="green">306</FONT>            for (TypeElement type : entry.getValue()) {<a name="line.306"></a>
<FONT color="green">307</FONT>                printer.println(type.getQualifiedName());<a name="line.307"></a>
<FONT color="green">308</FONT>            }<a name="line.308"></a>
<FONT color="green">309</FONT>            printer.close();<a name="line.309"></a>
<FONT color="green">310</FONT>            return true;<a name="line.310"></a>
<FONT color="green">311</FONT>        }<a name="line.311"></a>
<FONT color="green">312</FONT>    <a name="line.312"></a>
<FONT color="green">313</FONT>    }<a name="line.313"></a>




























































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